linux-kernel - Re: [PATCH 2/2] devicetree bindings I2C Add bindings doc for Sunplus SP7021

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Date:   Mon, 8 Nov 2021 13:23:07 -0600
From:   Rob Herring <robh@...nel.org>
To:     "LH.Kuo" <lhjeff911@...il.com>
Cc:     p.zabel@...gutronix.de, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        dvorkin@...bo.com, qinjian@...lus1.com, wells.lu@...plus.com,
        "LH.Kuo" <lh.kuo@...plus.com>
Subject: Re: [PATCH 2/2] devicetree bindings I2C Add bindings doc for Sunplus
 SP7021

On Fri, Oct 29, 2021 at 04:42:35PM +0800, LH.Kuo wrote:
> Add devicetree bindings I2C Add bindings doc for Sunplus SP7021

Please follow the subject convention used by the subsystem. This will 
be evident running 'git log --oneline'. For this one: 

'dt-bindings: i2c: ...'

> 
> Signed-off-by: LH.Kuo <lh.kuo@...plus.com>
> ---
>  .../devicetree/bindings/i2c/i2c-sunplus.yaml       | 82 ++++++++++++++++++++++
>  MAINTAINERS                                        |  1 +
>  2 files changed, 83 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/i2c/i2c-sunplus.yaml
> 
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-sunplus.yaml b/Documentation/devicetree/bindings/i2c/i2c-sunplus.yaml
> new file mode 100644
> index 0000000..7e2f827
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/i2c-sunplus.yaml
> @@ -0,0 +1,82 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright (C) Sunplus Co., Ltd. 2021
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/i2c/i2c-sunplus.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sunplus's I2C controller
> +
> +allOf:
> +  - $ref: /schemas/i2c/i2c-controller.yaml#
> +
> +maintainers:
> +  - lh.kuo <lh.kuo@...plus.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - sunplus,sp7021-i2cm
> +      - sunplus,q645-i2cm
> +
> +  reg:
> +    items:
> +      - description: Base address and length of the I2C registers
> +      - description: Base address and length of the I2C DMA registers
> +
> +  reg-names:
> +    items:
> +      - const: i2cm
> +      - const: i2cmdma
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +  clock-frequency:
> +    enum: [ 100000, 400000 ]
> +
> +  pinctrl-names:
> +    description:
> +      A pinctrl state named "default" must be defined.
> +    const: default
> +
> +  pinctrl-0:
> +    description:
> +      A phandle to the default pinctrl state.
> +
> +required:
> +  - compatible
> +  - reg
> +  - reg-names
> +  - interrupts
> +  - clocks
> +  - resets
> +  - pinctrl-names
> +  - pinctrl-0
> +
> +additionalProperties: false

This means you can't have any child nodes which I'd assume you want. You 
need 'unevaluatedProperties: false' instead.

> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/sp-sp7021.h>
> +    #include <dt-bindings/reset/sp-sp7021.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    i2cm0: i2c@...04600 {

Drop unused labels.

> +        compatible = "sunplus,sp7021-i2cm";
> +        reg = <0x9c004600 0x80>, <0x9c004680 0x80>;
> +        reg-names = "i2cm", "i2cmdma";
> +        interrupt-parent = <&intc>;
> +        interrupts = <174 IRQ_TYPE_LEVEL_HIGH>;
> +        clocks = <&clkc I2CM0>;
> +        resets = <&rstc RST_I2CM0>;
> +        clock-frequency = <100000>;
> +        pinctrl-names = "default";
> +        pinctrl-0 = <&i2cm0_pins>;
> +    };
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index c89a3b1..7dc9bea 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -17951,6 +17951,7 @@ SUNPLUS I2C CONTROLLER INTERFACE DRIVER
>  M:	LH Kuo <lh.kuo@...plus.com>
>  L:	linux-i2c@...r.kernel.org
>  S:	Maintained
> +F:	Documentation/devicetree/bindings/i2c/i2c-sunplus.yaml
>  F:	drivers/i2c/busses/i2c-sunplus.c
>  
>  SUPERH
> -- 
> 2.7.4
> 
>